| 31. | Each engine drives the axles on the bogies via an electronically controlled automatic gearbox.
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| 32. | Propulsion was a 220 ihp 2 cylinder reciprocating steam engine driving a single screw.
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| 33. | This was an elongated balloon with a steam engine driving twin propellers suspended underneath.
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| 34. | It was unusual in being powered by two separate stroke engines driving friction discs.
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| 35. | "There's every sign that the engine driving these changes continues to rev up ."
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| 36. | She had a 1 x 2 cyl compound engines driving a single screw propeller.
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| 37. | She had a Three cylinder triple expansion steam engine driving a single screw propeller.
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| 38. | It had a Franklin 4ACG-199-H3 engine driving a pusher propeller.
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| 39. | These engines drive propellers with three, scimitar shaped curved blades.
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| 40. | Hovercraft are usually powered by gas turbines or diesel engines driving propellors and impellors.
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